Bolt.



1N0. 842,450. PATENTED JAN. 29, 1907.

M. ENNIS.

BOLT. APPLIOATIOH I'IIQBD NOV. 17, 1906.

, UNITED, STATES PATENT oF ioE b MICHAEL ENNIS, or" N W EW JERSEY.

'BGLT;

Patented Jan. 29, 1907.

' Application filed Novemher 17,1906. Serial No. 343,854.

' To all whom it may concern:

. Be it known that I, MICHA L ENNis, a citizen of the United States',"res iding at Newark, in the county .ot-Essex and State of New J ersey, have invented certain new and useful Improvements in Bolts; and I do hereby de clare the following tobe a full, clear, and exact description of the invention, such as will enableothers skilled in the art towhich it 'appertains to make and use the same, ref-- erence being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification. Thisinventionrelates to a lock for bolts, and-is designed to hold a bolt against extraction from the recess in which it is insertep without manually bolt a locking-disk whichis spring-actuated tonormally lock the bolt in position.

. This device is applicable to different purposes and can be used on the ends of axles or in machine elements where it is necessary panying drawings, in Which-- to insure the-fastening of a bolt, and it also provides a construction that is simple to op crate. 1 The invention is illustrated in the accom- Figurelis'aview of the look as applied to I a bolt inserted into the end of a member, which is-in this case illustrated as a second; bolt. Fig. 2 is a vertical section of'the same, and Fig. 3 is a section on line 3 3 in Fig. 1. x

The "member 10, in the illustration shown as abolt, is the member that is adapted to receive the bolt to be locked and is provided with a screwthreaded rec ess 11, longitudinally' of which is arrangeda slot 12. Into this recess is screwed the bolt to'be locked,

which consists of the-screw-threaded shank 1,3a-nd ahead 14',"'the shank'and the head be ing-providedwith a longitudinal opening 15,

which is preferably- '-central. Eccentrically mounted on the end of the shank 13 is a pin ['16, and when the bolt is turned this pin' 16 revolves around, coming successively in. register With-the opening 17 in the locking-plate 18,'j.this locking-plate beingheld against r0- tation by-. a;tongue 19, fitting in the slot 12; x'l.rhefilo,cking-plate -is forced toward the en'- 1 tranee oi the-recess .11 by the spring-26' manipulating through the It will be seen that when the bolt 13 is to be inserted in the screw-threaded recess 11 the head 14 is turned, and at the same time a 1 time that the bolt is turned and keeps the.

locking-plate 18 out of engagement with. the screw-threaded shank 13. When the plate is to be locked, however, the pin 21 is with drawn and the pin 16 enters one of the openings or perforations 1'7, and the bolt is locked against rotation. If, however, the pin 16 is not in register with one of the openings 17, a small movement in one direction or the other of the screw-threaded shank 13 willcause the pin 16 to enter one of the perforations '17 and be locked against rotation in either direction.

When the elements are tobe taken apart, the pin2 1, is again inserted, the lock-plate 18 is slid back out of engagementwit-h the pin 16, and while the pin 21 is thus held in engagement with the plate 18 the bolt can be turned to withdraw the shank 13 from the recess 11. This provides a safe locking means, is easily operated, and insures against accidental separation of the parts.

Having thus described my invention, What I claim i 1; 111 Va bolt-lock, the combination with a member having a screw-threaded recess, the recess having a longitudinal slot therein, of a bolt having a screw-threaded shank, the bolt having a central perforation, a' pin eccentrically mounted on the end of the bolt, a locking-plate arranged to slide in therecess and having a tongue to fit in the groove, the locking-plate having a series of perforations concentrically arranged therein and adapted to come in line with the pin onthebolt, and

a spring between the locking-plate and the end of the recess in the first member.

2. A locking means for a bolt comprising a member .havinga shrew-threaded recess, the recess having a longitudinal groove, a bolt recess, the bolt having a longitudinal perforation, and a pin mounted eccentrically in the end of the bolt, a lock-plate sliding in the rehaving-ascrewrthreaded shank to fit in the cess having a tongue to fit in the groove, perhave hereunto set my hend this 15th day of forations 1n the locking-plate to engage the November. 1906.

pin on the bolt means fol" normally holdin L the looking-plate in engagement with th MICHAEL ENNIS 5 bolt, and manually-operated means for dis'- Witnesses:

engaging the lock-plate from the bolt. WM. H. CAMFIELI), v

In testimony that I claim'the foregoing I E. A.'PELL. 

